剪贴:TypeError: __init__()缺失1个必需的位置参数:“设置”

I have a Scrapy middleware:

我有一个简单的中间件:

class ProxyMiddleware(object):
    def __init__(self, settings):
        self.proxy_file = settings.get('PROXY_FILE')
        fin = open(self.proxy_file)
        self.proxy_list = list()
        for line in fin.readlines():
            parts = line.strip().split()
            proxy = parts[2] + '://' + parts[0] + ':' + parts[1]
            self.proxy_list.append(proxy)

    def process_request(self, request, spider):
        request.meta['proxy'] = random.choice(self.proxy_list)
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